diff options
Diffstat (limited to 'packages/linux/linux-2.6.18/mmc-add-detect-card-and-wp-support.patch')
| -rw-r--r-- | packages/linux/linux-2.6.18/mmc-add-detect-card-and-wp-support.patch | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.18/mmc-add-detect-card-and-wp-support.patch b/packages/linux/linux-2.6.18/mmc-add-detect-card-and-wp-support.patch new file mode 100644 index 0000000000..f91ddc239a --- /dev/null +++ b/packages/linux/linux-2.6.18/mmc-add-detect-card-and-wp-support.patch @@ -0,0 +1,159 @@ +Index: linux-2.6.18/drivers/mmc/atmel-mci.c +=================================================================== +--- linux-2.6.18.orig/drivers/mmc/atmel-mci.c 2007-01-16 14:01:56.000000000 +0100 ++++ linux-2.6.18/drivers/mmc/atmel-mci.c 2007-01-16 14:20:23.000000000 +0100 +@@ -72,7 +72,6 @@ + u32 error_status; + + int present; +- unsigned int wp_present:1; + + unsigned long bus_hz; + unsigned long mapbase; +@@ -538,9 +537,26 @@ + } + } + ++int atmci_get_ro(struct mmc_host *mmc) ++{ ++ int read_only = 0; ++ struct atmel_mci *host = mmc_priv(mmc); ++ ++ if (host->board->wp_pin != GPIO_PIO_NONE) { ++ read_only = gpio_get_value(host->board->wp_pin); ++ pr_debug("%s: card is %s\n", mmc_hostname(mmc), ++ (read_only ? "read-only" : "read-write") ); ++ } else { ++ pr_debug("%s: host does not support reading read-only switch." ++ " Assuming write-enable.\n", mmc_hostname(mmc)); ++ } ++ return read_only; ++} ++ + static struct mmc_host_ops atmci_ops = { + .request = atmci_request, + .set_ios = atmci_set_ios, ++ .get_ro = atmci_get_ro, + }; + + static void atmci_request_end(struct mmc_host *mmc, struct mmc_request *mrq) +@@ -695,6 +711,37 @@ + data->bytes_xfered = data->blocks * data->blksz; + atmci_data_complete(host, data); + } ++ if (mci_clear_card_detect_is_pending(host)) { ++ /* Reset controller if card is gone */ ++ if (!host->present) { ++ mci_writel(host, CR, MCI_BIT(SWRST)); ++ mci_writel(host, IDR, ~0UL); ++ mci_writel(host, CR, MCI_BIT(MCIEN)); ++ } ++ ++ /* Clean up queue if present */ ++ if (mrq) { ++ if (!mci_cmd_is_complete(host) ++ && !mci_cmd_error_is_complete(host)) { ++ mrq->cmd->error = MMC_ERR_TIMEOUT; ++ } ++ if (mrq->data && !mci_data_is_complete(host) ++ && !mci_data_error_is_complete(host)) { ++ dma_stop_request(host->dma.req.req.dmac, ++ host->dma.req.req.channel); ++ host->data->error = MMC_ERR_TIMEOUT; ++ atmci_data_complete(host, data); ++ } ++ if (mrq->stop && !mci_stop_is_complete(host) ++ && !mci_stop_error_is_complete(host)) { ++ mrq->stop->error = MMC_ERR_TIMEOUT; ++ } ++ ++ host->cmd = NULL; ++ atmci_request_end(mmc, mrq); ++ } ++ mmc_detect_change(host->mmc, msecs_to_jiffies(100)); ++ } + } + + static void atmci_cmd_interrupt(struct mmc_host *mmc, u32 status) +@@ -821,6 +868,23 @@ + return IRQ_HANDLED; + } + ++static irqreturn_t atmci_detect_int(int irq, void *dev_id, struct pt_regs *regs) ++{ ++ struct mmc_host *mmc = dev_id; ++ struct atmel_mci *host = mmc_priv(mmc); ++ ++ int present = !gpio_get_value(irq_to_gpio(irq)); ++ ++ if (present != host->present) { ++ pr_debug("%s: card %s\n", mmc_hostname(host->mmc), ++ present ? "inserted" : "removed"); ++ host->present = present; ++ mci_set_card_detect_pending(host); ++ tasklet_schedule(&host->tasklet); ++ } ++ return IRQ_HANDLED; ++} ++ + static int __devinit atmci_probe(struct platform_device *pdev) + { + struct atmel_mci *host; +@@ -887,15 +951,9 @@ + + if (host->board && host->board->wp_pin != GPIO_PIO_NONE) { + ret = gpio_request(host->board->wp_pin, "mmc_wp"); +- if (ret) { ++ if (ret) + printk(KERN_WARNING "%s: no WP pin available (%d)\n", + mmc_hostname(host->mmc), ret); +- host->wp_present = 0; +- } else { +- host->wp_present = 1; +- } +- } else { +- host->wp_present = 0; + } + + /* TODO: Get this information from platform data */ +@@ -928,6 +986,19 @@ + + mmc_add_host(mmc); + ++ if (host->present != -1) { ++ ret = request_irq(gpio_to_irq(host->board->detect_pin), ++ atmci_detect_int, ++ IRQF_TRIGGER_FALLING|IRQF_TRIGGER_RISING, ++ "mmci", mmc); ++ if (ret) { ++ printk(KERN_ERR "%s: could not request IRQ %d " ++ "for detect pin\n", ++ mmc_hostname(mmc), ++ gpio_to_irq(host->board->detect_pin)); ++ } ++ } ++ + printk(KERN_INFO "%s: Atmel MCI controller at 0x%08lx irq %d\n", + mmc_hostname(mmc), host->mapbase, irq); + +@@ -936,8 +1007,11 @@ + return 0; + + out_free_irq: +- if (host->present != -1) ++ if (host->present != -1) { ++ free_irq(gpio_to_irq(host->board->detect_pin), host->mmc); ++ cancel_delayed_work(&host->mmc->detect); + gpio_free(host->board->detect_pin); ++ } + if (host->board->wp_pin != GPIO_PIO_NONE) + gpio_free(host->board->wp_pin); + free_irq(irq, mmc); +@@ -971,6 +1045,7 @@ + host->dma.req.req.channel); + + if (host->present != -1) { ++ free_irq(gpio_to_irq(host->board->detect_pin), host->mmc); + cancel_delayed_work(&host->mmc->detect); + gpio_free(host->board->detect_pin); + } |